{
  "manageEntity": {
    "action": "Save",
    "entityId": "3477",
    "entityType": "Track",
    "nonce": "0x24483bd7ec500450ce31b5cc2bb932d57a51de44a8df351eb86ef60a5e1f0027",
    "signature": "0x1472a8897295c62e22fe0ad0d74362271534ef12ed265671c65f1b3e8abee9c33018334ab002baef1d26831b68f45d62be9a34df32556be9923cb30c222c1aac1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}